| (19) |
 |
|
(11) |
EP 1 170 351 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
05.11.2003 Bulletin 2003/45 |
| (43) |
Date of publication A2: |
|
09.01.2002 Bulletin 2002/02 |
| (22) |
Date of filing: 06.07.2001 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
Designated Extension States: |
|
AL LT LV MK RO SI |
| (30) |
Priority: |
07.07.2000 JP 2000206652
03.10.2000 JP 2000303719
11.05.2001 JP 2001142024
|
| (71) |
Applicant: TDK Corporation |
|
Chuo-ku, Tokyo 103-8272 (JP) |
|
| (72) |
Inventors: |
|
- Yano, Yoshihiko c/o TDK Corporation
Tokyo 103-8272 (JP)
- Oike, Tomoyuki c/o TDK Corporation
Tokyo 103-8272 (JP)
|
| (74) |
Representative: Strych, Werner Maximilian Josef, Dr. et al |
|
Hansmann & Vogeser, Patent- und Rechtsanwälte, Albert-Rosshaupter-Strasse 65
81369 München
81369 München (DE) |
|
| |
|
| (54) |
Phosphor thin film and its fabrication process and el panel |
(57) The invention has for its object to provide a phosphor thin film which can dispense
with any filter and has satisfactory color purity, is particularly well fit for RGB
full-color Els, and simplifies a full-color EL panel production process, thereby providing
a phosphor thin film which is less susceptible to luminance variations and can be
produced in improved yields and so at lower costs and its fabrication process as well
as an EL panel. This is achieved by the provision of a phosphor thin film comprising
a matrix material containing as a main component an alkali earth aluminate that is
an oxide, with sulfur added to the matrix material, and further containing an element
that provides a luminescentce center.